/Engine/Plugins/Media/MediaIOFramework/Source/MediaIOCore/Public/OrderedAsyncGate.h
Call this function when you are ready to give up your turn. It must be called with the number received from GetANumber, and it must be called whether WaitForTurn was called or not. Not giving up the turn will prevent any others from getting their turn. Note: It will internally call WaitForTurn.
void GiveUpTurn ( const uint32 Number )